Square Top Mainsails, our most advanced model, dominate Grand Prix racing worldwide. The square top profile provides highly efficient progressive twist, reduced mast tip vortex and optimized sail area distribution. North designers precisely balance sail camber with head width while accounting for specific mast bend characteristics and target sailing conditions. All sail elements work together, including membrane modulus, batten stiffness, and batten configuration – resulting in finely controlled airfoil performance.
High Performance Profile
High Performance Profile
SQUARE TOP RACING MAINSAIL
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3Di RAW
Standard features
Rule Optimized Roach Profile
Optimized Gaff Batten Angle
1 or more Full Length Battens
RBS E-Glass Tapered Battens
Exclusive Tie in Batten Adjusters
Cunningham
Adjustable Leech and Foot Cords
Loose Foot with Integral Foot Shelf
Exclusive Teardrop Corner Reinforcements
Stainless Steel Rings
Racing Trim Stripes
Nylon Twist (Leech) Tell Tales
Yarn Flow (Horizontal) Telltales
Class Insignia
Sail Numbers and Country Code
Certified Measurement
Drawstring Sail Bag
Optional features
Reef Points
Carbon Battens
Simple Luff Slides
Custom Luff & Batten Car Systems
Overhead Leech Cord
Spreader Tip Patches
Custom Graphics
Product Materials
3DiRAW
Minimum Weight. Maximum Speed
3Di RAW is the sail technology choice of champions. These high-performance race sails are the lightest weight, lowest stretch, and most highly engineered sails on the planet. If you're buying sails exclusively for racing, go RAW.
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3DiENDURANCE
Engineered to Last. Designed for Fast.
3Di ENDURANCE is the most rugged high-performance sail technology. These sails are around the world tested for longevity and reliability. Many 3Di Endurance sails have logged the equivalent of more than two circumnavigations and are still in service. If you’re buying sails for adventure racing or bluewater cruising, choose Endurance.
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NPLSPORT
Highest Performance Laminate Race Sailcloth
NPL SPORT is woven by North Sails, and it’s the market’s highest performance 2D laminate race sailcloth. A proprietary polyester resin system resists heat, water, and UV at a level unmatched by any string sail. Sails cut from NPL are significantly stronger, lower stretch, and lighter than competitor brands.
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NPCRADIAN
Woven Radial Revolution
Patented NPC RADIAN warp-oriented sailcloth is a unique non-laminated polyester material suitable for radial panel construction. Uncrimped warp yarns are interwoven with specially shaped fill yarns, allowing a more sophisticated radial panel construction than a traditional cross-cut layout. With NPC RADIAN, sailors enjoy lower stretch radial performance without films and glues.
